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An antiviral protein (AVP), imparting high level of resistance against sunnhemp rosette virus (SRV) was purified from the dried leaves of Amaranthus tricolor. The purified protein (AAP-27) exhibited approximately 98% inhibition of local lesion formation at a concentration range of approximately 30 microg ml(-1). The protein was found to be highly basic glycoprotein monomer (pI approximately 9.8) of Mr 27 kDa, with neutral sugar content of 4%. The purified protein exhibited N-glycosidase and RNase activities. We have also isolated full-length cDNA clone, encoding this protein designated as A. tricolor antiviral protein-1 (AAP-1). Two primers, one designed on the basis of N-terminal sequence of the purified protein and the other from the conserved active peptides of other AVPs/RIPs were used for PCR amplification of double stranded cDNA, isolated from the leaves of A. tricolor. The amplified fragment was used as a probe for library screening. The isolated full-length cDNA consisted of 1058 nucleotides with an open reading frame encoding a polypeptide of 297 amino acids. The deduced amino acid sequence of AAP-1 has a putative active domain conserved in other AVPs/RIPs and shows varying homology to the RIPs from other plant species.

An antiviral protein (AVP), imparting high level of resistance against sunnhemp rosette virus (SRV) was purified from the dried leaves of Amaranthus tricolor. The purified protein (AAP-27) exhibited approximately 98% inhibition of local lesion formation at a concentration range of approximately 30 microg ml(-1). The protein was found to be highly basic glycoprotein monomer (pI approximately 9.8) of Mr 27 kDa, with neutral sugar content of 4%. The purified protein exhibited N-glycosidase and RNase activities. We have also isolated full-length cDNA clone, encoding this protein designated as A. tricolor antiviral protein-1 (AAP-1). Two primers, one designed on the basis of N-terminal sequence of the purified protein and the other from the conserved active peptides of other AVPs/RIPs were used for PCR amplification of double stranded cDNA, isolated from the leaves of A. tricolor. The amplified fragment was used as a probe for library screening. The isolated full-length cDNA consisted of 1058 nucleotides with an open reading frame encoding a polypeptide of 297 amino acids. The deduced amino acid sequence of AAP-1 has a putative active domain conserved in other AVPs/RIPs and shows varying homology to the RIPs from other plant species.

Two-hundred fifty-six mothers and their newborns were subjected to clinical and haematological tests for the evidence of malaria. Placentae of these were examined histopathologically for malarial parasites and malarial pigment. Forty six placentae showed scanty malarial pigment ingested by monocytes. These appearances were associated with focal syncytial necrosis and proliferation of cytotrophoblastic cells. Plasmodium falciparum was found in cord blood of six cases. The mean weight of newborns born to mothers having no evidence of malarial placental infection was 2.763 kg, while mean weight of newborns belonging to infected placentae was 2.143 kg. The difference was highly significant.

Two-hundred fifty-six mothers and their newborns were subjected to clinical and haematological tests for the evidence of malaria. Placentae of these were examined histopathologically for malarial parasites and malarial pigment. Forty six placentae showed scanty malarial pigment ingested by monocytes. These appearances were associated with focal syncytial necrosis and proliferation of cytotrophoblastic cells. Plasmodium falciparum was found in cord blood of six cases. The mean weight of newborns born to mothers having no evidence of malarial placental infection was 2.763 kg, while mean weight of newborns belonging to infected placentae was 2.143 kg. The difference was highly significant.

Two-hundred fifty-six mothers and their newborns were subjected to clinical and haematological tests for the evidence of malaria. Placentae of these were examined histopathologically for malarial parasites and malarial pigment. Forty six placentae showed scanty malarial pigment ingested by monocytes. These appearances were associated with focal syncytial necrosis and proliferation of cytotrophoblastic cells. Plasmodium falciparum was found in cord blood of six cases. The mean weight of newborns born to mothers having no evidence of malarial placental infection was 2.763 kg, while mean weight of newborns belonging to infected placentae was 2.143 kg. The difference was highly significant.

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